Transformer bushing

Abstract

The utility model discloses a transformer bushing, and relates to the field of transformer bushings, the transformer bushing comprises a bushing, a flange plate, a sealing assembly, a sampling assembly, and a rotation limiting disc, so that the limiting disc drives a sliding block to rotate, and after the sliding block slides in an L-shaped limiting groove in a connecting pipe to a turning position of the L-shaped limiting groove, a limiting plate is pressed; a movable block is driven to compress a spring, so that the movable block moves in a connecting pipe, an oil discharge hole in the movable block is in butt joint with an insertion hole in the connecting pipe, insulating oil in a sleeve is conveniently discharged, sampling detection is achieved, sampling is convenient, and oil leakage caused by direct opening of a valve is avoided; the contact part of the jack and the connecting cylinder is sealed through the elastic deformation of the sealing ring, so that rainwater is prevented from entering the electric box, and after insertion, the transformer bushing is supported through the inserting pipe, so that the bushing is conveniently rotated subsequently to align the threaded hole, and the installation is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to power transmission equipment technical field, especially a transformer bushing. BACKGROUND

[0002] The transformer bushing is an insulation and protection component for the transformer, mainly playing the following roles of insulation, conduction, protection and fixing, and the types of the transformer bushing are various, including oil-immersed bushing, dry-type bushing, gas-filled bushing and the like.

[0003] When the transformer bushing is installed, the copper wire in the electric box is pulled out and passes through the bushing, then the bottom end of the bushing is inserted into the inside of the electric box, and then the flange plate on the outer surface of the bushing is installed and fixed, the inside of the bushing is provided with insulating substances, and in order to improve the cooling effect inside the transformer bushing and prevent electrical breakdown, the inside of the bushing is generally also provided with insulating oil, and during use, the insulating oil needs to be detected regularly through the valve on the outer surface of the bushing, so as to ensure that the bushing can normally operate.

[0004] The existing oil discharge valve of the transformer bushing is arranged above the flange plate, when the oil body needs to be detected through the oil discharge valve, the valve is opened, so that the oil body in the inside of the bushing leaks out, so as to take the oil body for detection, but after the valve is opened, the oil body will remain along the surface of the bushing, which is easy to cause the surface of the bushing to be contaminated, and it is inconvenient to use. UTILITY MODEL CONTENTS

[0005] (I) Technical problem solved

[0006] In view of the problems existing in the prior art, the utility model provides a transformer bushing.

[0007] (II) Technical scheme

[0008] In order to achieve the above purpose, the utility model is realized by the following technical scheme: a transformer bushing, comprising a bushing, a flange plate is arranged on the outer surface of the bushing, a sealing assembly is arranged at the bottom end of the flange plate, and a sampling assembly is arranged on the outer surface of the bushing;

[0009] The sampling assembly comprises a connecting pipe fixedly connected to the outer surface of the bushing, a spring is fixedly connected to the inner wall of the connecting pipe, a moving block is fixedly connected to the end of the spring away from the bushing, oil discharge holes for sampling are arranged in the inside of the moving block and the connecting pipe, and a limiting disc is movably connected to the side of the moving block away from the spring;

[0010] The sealing assembly comprises a plug-in pipe fixedly connected to the lower surface of the flange plate, a connecting barrel is fixedly connected to the bottom end of the plug-in pipe, and a plurality of sealing rings are fixedly connected to the outer surface of the connecting barrel.

[0011] As a preferred scheme of the transformer bushing, four sliding blocks are fixedly connected to the outer surface of the limiting disc, the inner wall of the connecting pipe is provided with L-shaped limiting grooves matched with the sliding blocks, and two insertion holes are arranged on the side of the limiting disc away from the spring.

[0012] As a preferred scheme of the transformer bushing, two insertion rods are fixedly connected to the inside of the connecting pipe, and an insertion groove matched with the insertion rod is arranged on the side of the moving block close to the insertion rod.

[0013] As a preferred scheme of the transformer bushing, the depth of the internal insertion groove of the moving block, the distance between the internal oil discharge hole of the moving block and the internal oil discharge hole of the connecting pipe, and the length of the L-shaped limiting groove are all the same.

[0014] As a preferred scheme of the transformer bushing, a sealing cover is threadedly connected to the outer surface of the end of the connecting pipe away from the bushing.

[0015] As a preferred scheme of the transformer bushing, the diameter of the sealing ring is slightly larger than the diameter of the mounting hole when the bushing is mounted, and the internal part of the flange disc is provided with a plurality of fixing bolts for mounting the bushing.

[0016] (Three) beneficial effects

[0017] The utility model provides a kind of transformer bushing. It has the following beneficial effects:

[0018] 1, rotating limiting disc, so that limiting disc drives sliding block to rotate, sliding block is inside the L-shaped limiting groove inside the connecting pipe and is slid to the turning position of L-shaped limiting groove, then press limiting plate, drive moving block to compress spring, so that moving block moves in connecting pipe, the oil discharge hole in the internal part of moving block is connected with the insertion hole in the internal part of connecting pipe, the insulating oil in bushing is conveniently discharged, to realize sampling detection, convenient sampling, avoid directly opening valve to cause oil leakage.

[0019] 2, the bottom end of connecting cylinder is inserted into the insertion hole of the outer surface of electric box, the contact part of insertion hole and connecting cylinder is sealed by the elastic deformation of sealing ring, to avoid rainwater into electric box, after insertion, transformer bushing is supported by insertion pipe, convenient subsequent rotating bushing to align threaded hole, convenient installation. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the following embodiment description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the premise of not paying creative effort.

[0021] Figure 1 It is the overall structure schematic view of the present application.

[0022] Figure 2 It is the structure schematic view of the sampling assembly of the present application.

[0023] Figure 3 It is the cross-section structure schematic view of the sampling assembly of the present application.

[0024] Figure 4 It is the explosion structure schematic view of the connecting pipe of the present application.

[0025] Figure 5 It is the structure schematic view of the sealing assembly of the present application.

[0026] In the figure, 1, sleeve; 2, sealing assembly; 201, plug-in pipe; 202, sealing ring; 203, fixing bolt; 204, connecting cylinder; 3, sampling assembly; 301, sealing cover; 302, connecting pipe; 303, spring; 304, moving block; 305, limiting disc; 306, sliding block; 307, plug-in rod; 4, flange plate. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application.

[0028] Embodiment 1

[0029] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the first embodiment of the present application provides a transformer sleeve, which comprises a sleeve 1, the outer surface of the sleeve 1 is provided with a flange plate 4, the bottom end of the flange plate 4 is provided with a sealing assembly 2, the outer surface of the sleeve 1 is provided with a sampling assembly 3, the sampling assembly 3 comprises a connecting pipe 302 fixedly connected to the outer surface of the sleeve 1, the inner wall of the connecting pipe 302 is fixedly connected with a spring 303, the end of the spring 303 away from the sleeve 1 is fixedly connected with a moving block 304, the inside of the moving block 304 and the connecting pipe 302 are both provided with an oil discharge hole for sampling, the side of the moving block 304 away from the spring 303 is movably connected with a limiting disc 305.

[0030] Specifically, the outer surface of the limiting disc 305 is fixedly connected with four sliding blocks 306, the inner wall of the connecting pipe 302 is provided with L-shaped limiting grooves matched with the sliding blocks 306, the side, away from the spring 303, of the limiting disc 305 is provided with two insertion holes, the inside of the connecting pipe 302 is fixedly connected with two insertion rods 307, the side, close to the insertion rods 307, of the moving block 304 is provided with insertion grooves matched with the insertion rods 307, the depth of the insertion grooves in the moving block 304, the distance between the oil discharge hole in the moving block 304 and the oil discharge hole in the connecting pipe 302 and the length of the L-shaped limiting grooves are all the same, and the outer surface of the end, away from the sleeve 1, of the connecting pipe 302 is threadedly connected with a sealing cover 301.

[0031] Further, the inside of the limiting disc 305 and the moving block 304 is inserted by an external tool, the insertion holes in the outer surface of the limiting disc 305 are aligned, then the limiting disc 305 is rotated, so that the limiting disc 305 drives the sliding blocks 306 to rotate, so that the sliding blocks 306 slide in the L-shaped limiting grooves in the connecting pipe 302, after sliding to the turning positions of the L-shaped limiting grooves, the limiting disc 305 is pressed, the moving block 304 is compressed, the moving block 304 moves on the outer surface of the insertion rods 307, when the deepest insertion groove in the moving block 304 abuts against the insertion rods 307, the oil discharge hole in the moving block 304 can be just butted against the insertion hole in the connecting pipe 302, so that the insulating oil in the sleeve 1 is discharged, so that sampling detection is realized, the connecting position of the moving block 304 and the connecting pipe 302 is always sealed, so that oil body penetration leakage is avoided, and the oil discharge hole in the connecting pipe 302 is communicated with the inner cavity of the sleeve 1.

[0032] Embodiment 2

[0033] With reference to Figure 1 、 Figure 2 and Figure 5 , the sealing assembly 2 comprises an insertion pipe 201 fixedly connected to the lower surface of the flange plate 4, and the bottom end of the insertion pipe 201 is fixedly connected with a connecting barrel 204, and the outer surface of the connecting barrel 204 is fixedly connected with a plurality of sealing rings 202.

[0034] Specifically, the diameter of the sealing ring 202 is slightly larger than the diameter of the mounting hole of the sleeve 1, and the inside of the flange plate 4 is provided with a plurality of fixing bolts 203 for mounting the sleeve 1.

[0035] Further, after the bottom end of the bushing 1 is inserted into the electric box, when the flange plate 4 is about to end the outer surface of the electric box, the bottom end of the connecting cylinder 204 is inserted into the insertion hole on the outer surface of the electric box, and the contact part of the insertion hole and the connecting cylinder 204 is sealed by the elastic deformation of the sealing ring 202, so as to avoid rainwater from entering the electric box. After insertion, the insertion pipe 201 supports the insertion hole on the outer surface of the electric box, thereby providing support for the transformer bushing 1 when the fixing nut has not been installed, avoiding the flange plate 4 directly supported on the outer surface of the electric box, causing difficulty in rotating the threaded hole in the subsequent alignment, and the sealing ring 202 is made of soft material, facilitating deformation during insertion.

[0036] Working principle: when installing the transformer bushing 1, after the bottom end of the bushing 1 is inserted into the electric box, when the flange plate 4 is about to end the outer surface of the electric box, the bottom end of the connecting cylinder 204 is inserted into the insertion hole on the outer surface of the electric box, and the contact part of the insertion hole and the connecting cylinder 204 is sealed by the elastic deformation of the sealing ring 202, so as to avoid rainwater from entering the electric box. After insertion, the insertion pipe 201 supports the insertion hole on the outer surface of the electric box, thereby providing support for the transformer bushing 1 when the fixing nut has not been installed, avoiding the flange plate 4 directly supported on the outer surface of the electric box, causing difficulty in rotating the threaded hole in the subsequent alignment, and the sealing ring 202 is made of soft material, facilitating deformation during insertion.

[0037] It is to be understood that the terminology "first" and "second" and the like used herein is merely intended to differentiate one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between such entities or operations.

Claims

1. A transformer bushing comprising a bushing (1), the outer surface of which is provided with a flange plate (4), characterized in that: The bottom end of the flange plate (4) is provided with a sealing assembly (2), and the outer surface of the sleeve (1) is provided with a sampling assembly (3); The sampling assembly (3) comprises a connecting pipe (302) fixedly connected to the outer surface of the sleeve (1), the inner wall of the connecting pipe (302) is fixedly connected with a spring (303), the end of the spring (303) away from the sleeve (1) is fixedly connected with a moving block (304), the inside of the moving block (304) and the connecting pipe (302) are both provided with an oil discharging hole for sampling, and the side of the moving block (304) away from the spring (303) is movably connected with a limiting disc (305). The sealing assembly (2) comprises a plug-in pipe (201) fixedly connected to the lower surface of the flange plate (4), the bottom end of the plug-in pipe (201) is fixedly connected with a connecting cylinder (204), and the outer surface of the connecting cylinder (204) is fixedly connected with a plurality of sealing rings (202).

2. A transformer bushing according to claim 1, characterized in that: The outer surface of the limiting disc (305) is fixedly connected with four sliding blocks (306), the inner wall of the connecting pipe (302) is provided with an L-shaped limiting groove matched with the sliding blocks (306), and the side of the limiting disc (305) away from the spring (303) is provided with two insertion holes.

3. A transformer bushing according to claim 2, characterized in that: The inside of the connecting pipe (302) is fixedly connected with two plug-in rods (307), and the side of the moving block (304) close to the plug-in rods (307) is provided with an insertion groove matched with the plug-in rods (307).

4. A transformer bushing according to claim 3, characterized in that: The depth of the insertion groove in the moving block (304), the distance between the oil discharging hole in the moving block (304) and the oil discharging hole in the connecting pipe (302), and the length of the L-shaped limiting groove are all the same.

5. A transformer bushing according to claim 4, characterized in that: The outer surface of the end of the connecting pipe (302) away from the sleeve (1) is threadedly connected with a sealing cover (301).

6. A transformer bushing according to claim 5, characterized in that: The diameter of the sealing ring (202) is slightly larger than the diameter of the installation hole when the sleeve (1) is installed, and the inside of the flange plate (4) is provided with a plurality of fixing bolts (203) for installing the sleeve (1).

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